Incandescent lamp



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mama? or roan, ou'rnnro, 'cnmnhr Y 7 emnascam Lauri Application filedli'oveinlier a, 1922. serial No. 603,742.

r I D I 1 To all whom it may'conc em: Be it known that I, 'EREMY zen ofCanada, residing at Ford, in the Province ofOntario. and Dominion ofCana da,v have invented certain new and usefnl Improvements inIncandescent Lamps, of which the following is aspecification.

This invention relates toinc'andescent v lamp having for a eneral objectthe provil0 sion of a multiple'fi ament lamp.

, 'Other objects relate to the mounting of the filament and to theprovisions-of parallel connections or arrangementsfor a single filamentwhereby the latter serves as a multiple filament, the various sectionsof the single filament being electrically independent of one another. c

F or further-comprehension of theiliven tion, and of the. objects andadvantages thereof, reference willbe had to the following descriptionand accompanying; drawings, and to the a pended c aims in which thevarious nqvel eatures of the invention are more particularly-set forth.4

Fig. 1.01 the drawings is a perspective View of' an incandescent lampconstructed according to the invention.

Fig. 2 1s a partial central longitudinal sec- I tional' view thelreofi rf Fig. 3 a etai perspective view '0 one of the fila i nent holdinmembers. Referring now to t e drawings 10 indi.

y a J cates a glass bulb of usual form which is set V V in the usualplastic material'll'in the thread 3 ed base 12. Extending centrallythrough this bulb is ,a glass tube 13 whose outer end is inturned toengage over a frusto-conical' neck 14 projecting from a disk-like head15.- Soldered or otherwise secured to this head 15 is a disk 16 havin anumber, preferably five, of inte ral radia arms 17 over the ends ofwhich a ament 18 is. looped.

Adjacent the base of the lamp the tube 13 is bulged outwardly as at .20to. provide a shouldered element on which sits a disk 21 having anumberof integral radial arms 22 to receive the filament 18. i The disk121 hasa central aperture 23 which receives the tube 13. In the making of theparts a nar- 0 row tongue 24 is struck from the disk 21 previous to theforming of the aperture 23 and previous also to the securing to theunderside of thedisk of a circularrinteriorly screw-threadedflange 26which may be soldered in place. 'Engaged in this flange 26 "current flowing upwardly from an apertured member 28 which 'sits against The 'tongue24 extends-downwardly outside. the flange 26 and is carried throughasuitable apertureinnthe neck of the bulb and soldered at its. end tothe base member 12. 'The base of thelamp has mounted thereon the'usualcentral .contact' element 30 and a wire 31 is extended down the tube 13and "soldered at opposite ends to the disk 16 and to this element 30.

per and lowersets of arms 17 and 22 and in the lower face of the bulgedelement 20. t

' Q an exteriorly threaded flange 27 project KIRIAK, a citiof the.filament toifrenrain' attached to the arms in the event of rupture ofthe filament at some point the ends of said arms are bent as at 17 f and22 to form V-notches in which the filament is wedged with sufficientforce to hold it-in place.

. As will be apparent, the various sections of the filament areconnected in arallel, thus in effect producing a multiple ament, and inthe event of rupture of ohe section as usual through the. remain ngsections.

My invention is designedmore particularly for embodiment in lamps of lowvoltage,

such as six to eight volts, although I1 do not limitthe application" ofthe invention to such lamps. It will also be understood that while Ihave illustrated and described a preferred'embodiment ofthe. invention Ido not limit myself to' theexact construction herein disclosed and thatvarious changes-- and modifications might be. made without departingfrom the spirit' and scope of the mventlon as definedin the appendedclaims.

Y Havingthus described my invention what 7 Letters Patent of the UnitedStates is. as follows 1. In an incandescent lan'ip, a filament Supportcomprising an elongated member having a circumferential shoulder formedthere on, a disk resting on said shoulder and hav ing '21 dependingexteriorly screw-threaded I claim as new and desire to protect by "1 inwhich said bulb ,is set, a tube exbendsaid'disk'imd engaged'wit 12. Inan incandescent lamn, a. bu1b, a. base ov er and ai-n integi-altoniueljadijating from I said base to forming centrally through the said bulband the electrical connection between the fila 10 formed withyacircumferential shoulderfa, menta'nd thebaset I disk-clamped upon saidshoulder and hav In testimony whereof'i'huye afiiired my ing' pgnulhberof arms radiating therefrom signature; andadapted tobayve a filamentlooped there- 'li lREM-Y KIRIAK v

